I need to help someone reinstall XP Pro, but they can't find their install disk. I can get the Product Key out of the current install using KeyFinder, but I don't have an XP Pro Upgrade disk, only XP Pro OEM and XP Pro Retail. Is there a way to get another disk from Microsoft? I also seem to remember a way to change something on the install disk to change it from one version of XP to another. Thanks.